Updated openstack/openstack
Project: openstack/glance  12e80f8711eaa1d99f349205c206a49258665390

Can not delete images if db deadlock occurs

Glance api returns 500 Internal Server Error, if db deadlock occurs
in glance-registry for some reason while deleting an image.

Added retry on image_destroy when db deadlock occures which will again
try to delete the image from database.

Closes-bug: 1378215
Change-Id: Ifad403e363daf368e846b5b6838432a7bedbe81a